ca005f324e
This has no users since commit f0fba2ad1b ("ASoC: multi-component - ASoC
Multi-Component Support") which was almost 5 years ago. Given that this runs
after CODEC probe functions have been run it also doesn't seem to be that
useful.
So drop it altogether to make the code simpler.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
345 lines
8.2 KiB
C
345 lines
8.2 KiB
C
/*
|
|
* soc-ac97.c -- ALSA SoC Audio Layer AC97 support
|
|
*
|
|
* Copyright 2005 Wolfson Microelectronics PLC.
|
|
* Copyright 2005 Openedhand Ltd.
|
|
* Copyright (C) 2010 Slimlogic Ltd.
|
|
* Copyright (C) 2010 Texas Instruments Inc.
|
|
*
|
|
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
|
|
* with code, comments and ideas from :-
|
|
* Richard Purdie <richard@openedhand.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/ctype.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/export.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/of.h>
|
|
#include <linux/pinctrl/consumer.h>
|
|
#include <linux/slab.h>
|
|
#include <sound/ac97_codec.h>
|
|
#include <sound/soc.h>
|
|
|
|
struct snd_ac97_reset_cfg {
|
|
struct pinctrl *pctl;
|
|
struct pinctrl_state *pstate_reset;
|
|
struct pinctrl_state *pstate_warm_reset;
|
|
struct pinctrl_state *pstate_run;
|
|
int gpio_sdata;
|
|
int gpio_sync;
|
|
int gpio_reset;
|
|
};
|
|
|
|
static struct snd_ac97_bus soc_ac97_bus = {
|
|
.ops = NULL, /* Gets initialized in snd_soc_set_ac97_ops() */
|
|
};
|
|
|
|
/* register ac97 codec to bus */
|
|
static int soc_register_ac97_codec(struct snd_soc_codec *codec,
|
|
struct snd_soc_dai *codec_dai)
|
|
{
|
|
int ret;
|
|
|
|
/* Only instantiate AC97 if not already done by the adaptor
|
|
* for the generic AC97 subsystem.
|
|
*/
|
|
if (!codec_dai->driver->ac97_control || codec->ac97_registered)
|
|
return 0;
|
|
|
|
/*
|
|
* It is possible that the AC97 device is already registered to
|
|
* the device subsystem. This happens when the device is created
|
|
* via snd_ac97_mixer(). Currently only SoC codec that does so
|
|
* is the generic AC97 glue but others migh emerge.
|
|
*
|
|
* In those cases we don't try to register the device again.
|
|
*/
|
|
if (!codec->ac97_created)
|
|
return 0;
|
|
|
|
codec->ac97->dev.bus = &ac97_bus_type;
|
|
codec->ac97->dev.parent = codec->component.card->dev;
|
|
|
|
dev_set_name(&codec->ac97->dev, "%d-%d:%s",
|
|
codec->component.card->snd_card->number, 0,
|
|
codec->component.name);
|
|
ret = device_add(&codec->ac97->dev);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "ASoC: AC97 device register failed: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
codec->ac97_registered = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void soc_unregister_ac97_codec(struct snd_soc_codec *codec)
|
|
{
|
|
if (!codec->ac97_registered)
|
|
return;
|
|
device_del(&codec->ac97->dev);
|
|
codec->ac97_registered = 0;
|
|
}
|
|
|
|
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
int i, ret;
|
|
|
|
for (i = 0; i < rtd->num_codecs; i++) {
|
|
struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
|
|
|
|
ret = soc_register_ac97_codec(codec_dai->codec, codec_dai);
|
|
if (ret) {
|
|
while (--i >= 0)
|
|
soc_unregister_ac97_codec(codec_dai->codec);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void soc_unregister_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < rtd->num_codecs; i++)
|
|
soc_unregister_ac97_codec(rtd->codec_dais[i]->codec);
|
|
}
|
|
|
|
static void soc_ac97_device_release(struct device *dev)
|
|
{
|
|
kfree(to_ac97_t(dev));
|
|
}
|
|
|
|
/**
|
|
* snd_soc_new_ac97_codec - initailise AC97 device
|
|
* @codec: audio codec
|
|
*
|
|
* Initialises AC97 codec resources for use by ad-hoc devices only.
|
|
*/
|
|
int snd_soc_new_ac97_codec(struct snd_soc_codec *codec)
|
|
{
|
|
codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
|
|
if (codec->ac97 == NULL)
|
|
return -ENOMEM;
|
|
|
|
codec->ac97->bus = &soc_ac97_bus;
|
|
codec->ac97->num = 0;
|
|
codec->ac97->dev.release = soc_ac97_device_release;
|
|
|
|
/*
|
|
* Mark the AC97 device to be created by us. This way we ensure that the
|
|
* device will be registered with the device subsystem later on.
|
|
*/
|
|
codec->ac97_created = 1;
|
|
device_initialize(&codec->ac97->dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
|
|
|
|
/**
|
|
* snd_soc_free_ac97_codec - free AC97 codec device
|
|
* @codec: audio codec
|
|
*
|
|
* Frees AC97 codec device resources.
|
|
*/
|
|
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
|
|
{
|
|
soc_unregister_ac97_codec(codec);
|
|
codec->ac97->bus = NULL;
|
|
put_device(&codec->ac97->dev);
|
|
codec->ac97 = NULL;
|
|
codec->ac97_created = 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
|
|
|
|
static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;
|
|
|
|
static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)
|
|
{
|
|
struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
|
|
|
|
pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);
|
|
|
|
gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);
|
|
|
|
udelay(10);
|
|
|
|
gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
|
|
|
|
pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
|
|
msleep(2);
|
|
}
|
|
|
|
static void snd_soc_ac97_reset(struct snd_ac97 *ac97)
|
|
{
|
|
struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
|
|
|
|
pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);
|
|
|
|
gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
|
|
gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);
|
|
gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);
|
|
|
|
udelay(10);
|
|
|
|
gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);
|
|
|
|
pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
|
|
msleep(2);
|
|
}
|
|
|
|
static int snd_soc_ac97_parse_pinctl(struct device *dev,
|
|
struct snd_ac97_reset_cfg *cfg)
|
|
{
|
|
struct pinctrl *p;
|
|
struct pinctrl_state *state;
|
|
int gpio;
|
|
int ret;
|
|
|
|
p = devm_pinctrl_get(dev);
|
|
if (IS_ERR(p)) {
|
|
dev_err(dev, "Failed to get pinctrl\n");
|
|
return PTR_ERR(p);
|
|
}
|
|
cfg->pctl = p;
|
|
|
|
state = pinctrl_lookup_state(p, "ac97-reset");
|
|
if (IS_ERR(state)) {
|
|
dev_err(dev, "Can't find pinctrl state ac97-reset\n");
|
|
return PTR_ERR(state);
|
|
}
|
|
cfg->pstate_reset = state;
|
|
|
|
state = pinctrl_lookup_state(p, "ac97-warm-reset");
|
|
if (IS_ERR(state)) {
|
|
dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");
|
|
return PTR_ERR(state);
|
|
}
|
|
cfg->pstate_warm_reset = state;
|
|
|
|
state = pinctrl_lookup_state(p, "ac97-running");
|
|
if (IS_ERR(state)) {
|
|
dev_err(dev, "Can't find pinctrl state ac97-running\n");
|
|
return PTR_ERR(state);
|
|
}
|
|
cfg->pstate_run = state;
|
|
|
|
gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);
|
|
if (gpio < 0) {
|
|
dev_err(dev, "Can't find ac97-sync gpio\n");
|
|
return gpio;
|
|
}
|
|
ret = devm_gpio_request(dev, gpio, "AC97 link sync");
|
|
if (ret) {
|
|
dev_err(dev, "Failed requesting ac97-sync gpio\n");
|
|
return ret;
|
|
}
|
|
cfg->gpio_sync = gpio;
|
|
|
|
gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);
|
|
if (gpio < 0) {
|
|
dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);
|
|
return gpio;
|
|
}
|
|
ret = devm_gpio_request(dev, gpio, "AC97 link sdata");
|
|
if (ret) {
|
|
dev_err(dev, "Failed requesting ac97-sdata gpio\n");
|
|
return ret;
|
|
}
|
|
cfg->gpio_sdata = gpio;
|
|
|
|
gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
|
|
if (gpio < 0) {
|
|
dev_err(dev, "Can't find ac97-reset gpio\n");
|
|
return gpio;
|
|
}
|
|
ret = devm_gpio_request(dev, gpio, "AC97 link reset");
|
|
if (ret) {
|
|
dev_err(dev, "Failed requesting ac97-reset gpio\n");
|
|
return ret;
|
|
}
|
|
cfg->gpio_reset = gpio;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct snd_ac97_bus_ops *soc_ac97_ops;
|
|
EXPORT_SYMBOL_GPL(soc_ac97_ops);
|
|
|
|
int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)
|
|
{
|
|
if (ops == soc_ac97_ops)
|
|
return 0;
|
|
|
|
if (soc_ac97_ops && ops)
|
|
return -EBUSY;
|
|
|
|
soc_ac97_ops = ops;
|
|
soc_ac97_bus.ops = ops;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);
|
|
|
|
/**
|
|
* snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions
|
|
*
|
|
* This function sets the reset and warm_reset properties of ops and parses
|
|
* the device node of pdev to get pinctrl states and gpio numbers to use.
|
|
*/
|
|
int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,
|
|
struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct snd_ac97_reset_cfg cfg;
|
|
int ret;
|
|
|
|
ret = snd_soc_ac97_parse_pinctl(dev, &cfg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = snd_soc_set_ac97_ops(ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ops->warm_reset = snd_soc_ac97_warm_reset;
|
|
ops->reset = snd_soc_ac97_reset;
|
|
|
|
snd_ac97_rst_cfg = cfg;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);
|
|
|
|
int snd_soc_ac97_register_dai_links(struct snd_soc_card *card)
|
|
{
|
|
int i;
|
|
int ret;
|
|
|
|
/* register any AC97 codecs */
|
|
for (i = 0; i < card->num_rtd; i++) {
|
|
ret = soc_register_ac97_dai_link(&card->rtd[i]);
|
|
if (ret < 0)
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
err:
|
|
dev_err(card->dev,
|
|
"ASoC: failed to register AC97: %d\n", ret);
|
|
while (--i >= 0)
|
|
soc_unregister_ac97_dai_link(&card->rtd[i]);
|
|
return ret;
|
|
}
|